Chevy Silverado and GMC Sierra Forum banner
Status
Not open for further replies.

Transmission temp too hot?

122K views 7 replies 7 participants last post by  r41n14r 
#1 ·
I have a 2012 Silverado 1/2 ton with the 6 speed. What is the max temp on the transmission before I need to worry?
 
#2 ·
Here's a response from another site, but it is verified.

In the February 2011 issue of Trailer Life magazine RV Clinic in response to a reader about the maximum transmission temperature allowed in a 2009 Chevy Silverado, the Tech Team had this response.

"General Motors' in-house towing team expert provided RV Clinic with this statement: The maximum allowable automatic transmission fluid temperature is dictated by the transmission oil itself. The oil begins to degrade significantly above 270 degrees Fahrenheit, so we design vehicles so that in all but the most extreme conditions, the fluid temperature in the transmission sump stays below 270 degrees F.

We allow for up to 285 degrees F in extreme conditions (i.e. towing a trailer with combination loaded at GCWR in Death Valley). But for customer usage anywhere else in the country, even at GCWR, transmission sump temperature should stay well below 270 degrees F. Above this point, certain internal components, such as seals, begin to disintegrate rather quickly. Although newer synthetic fluids can withstand higher temperatures we still recommend this (270F) as a maximum temperature. "

Hope this helps.
 
#5 ·
Very nice answer! Now ima try to give specs if i get them right from memory, i think i got this from Z15 but idk a google will prally being this up but, for ever 25 degrees over 195 you lose 50% of the rated life, so another 25% puts you at 25% rated life(.50x.50)

So oil @ 245(195+25+25) will run at that temp for 25% of the rated life(100k x .25) 25kmiles at 245...
 
#6 ·
This will protect your transmission from the heat.

EXCEPTIONAL HOT- AND COLD-TEMPERATURE PERFORMANCE
Thermal Stability - Hot temperatures are no excuse for poor reliability. Naturally heat-resistant and heavily fortified with anti-oxidants, AMSOIL Synthetic Fuel Efficient Automatic Transmission Fluid exceeds the most demanding oxidation requirements. It delivers outstanding protection against sludge and varnish deposits that clog narrow oil passages and contribute to clutch glazing. AMSOIL Fuel Efficient ATF protects hot-running transmissions.



 
#7 ·
Machster69 said:
Very nice answer! Now ima try to give specs if i get them right from memory, i think i got this from Z15 but idk a google will prally being this up but, for ever 25 degrees over 195 you lose 50% of the rated life, so another 25% puts you at 25% rated life(.50x.50)

So oil @ 245(195+25+25) will run at that temp for 25% of the rated life(100k x .25) 25kmiles at 245...
This is from a chart that is over twenty years old......

It was wrong then BTW.
 
#8 ·
I find it nearly impossible to reply to posts about syn trans fluid. So I tried conventional and synthetic transmission fluid and the syn runs hotter. I know it can withstand higher heat but the seals are still the same! I believe the syn fluid runs hotter because in the torque converter (the heat maker) a thinner fluid will take longer to push the torque out. This is my belief.
 
Status
Not open for further replies.
You have insufficient privileges to reply here.
Top